When saturated these layers can weigh in at more than 100kg per square metre or 20lbs per square foot.
Green roof system for shed.
The smart box sedum modular advanced roof tray come as ready grown modular boxes which firmly slot together each containing its own unique water storage system and substrate ensuring easy installation and no slippage.
Alternatively you can reinforce and brace the internal shed structure and roofing joists before fitting.
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It is always best when buying a shed for this purpose to go for a reinforced shed.
Green roof systems prices.
A shallow roof pitch wont allow water to drain away.
Make a simple frame with the same dimensions as your shed s roof from pieces of rot proof timber using l brackets for the corners.
For a green roof installation that pitch should be at least inch per foot of run.
This gave a 1 40 slope which was enough to encourage water to drain.
System with roof basic protection layer.
When fitting a green roof to a shed make sure that your shed roof can take the increased weight load from a green roof.
System with drainage and production layer.
The slope of a green shed roof needs to be a balance between being too steep or too shallow.
This was not flat at all but had a fall of 75mm 3 over its length of 2 4m 8.
How to make a green roof.
You are going to be adding significant extra weight onto the shed roof so you need to know that the structure is strong enough to support it.
Even a flat roof should have some pitch so that it sheds water toward gutters.
For this shed i used nominally flat roof.
Green roofs are made up of several layers typically a waterproof root barrier layer to protect the roof a drainage layer water retention mat then the growing medium and vegetation.
Before the plants go up a structural engineer should check to ensure that the roof can support the weight of the engineered growing medium and plants.
A standard shed such as the bestselling overlap apex garden shed above right or overlap pent roof garden shed is likely to fit the bill.
Green roofs can range from roof gardens with raised beds and pots to rolled out green carpets to shed roofs containing planting cells that are filled with soil or compost and planted up with low growing perennials and grasses.
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Step 1 check if it is load bearing.
Sedum green roof supply a wide range of top quality sedum mats and modular diy trays for green roofs.